OpenSearch/docs/reference/indices/refresh.asciidoc

[[indices-refresh]]
=== Refresh API
++++
<titleabbrev>Refresh</titleabbrev>
++++

Refreshes one or more indices. For data streams, the API refreshes the stream's
backing indices.

[source,console]
----
POST /my-index-000001/_refresh
----
// TEST[setup:my_index]


[[refresh-api-request]]
==== {api-request-title}

`POST <target>/_refresh`

`GET <target>/_refresh`

`POST /_refresh`

`GET /_refresh`


[[refresh-api-desc]]
==== {api-description-title}

Use the refresh API to explicitly refresh one or more indices.
If the request targets a data stream, it refreshes the stream's backing indices.
A _refresh_ makes all operations performed on an index
since the last refresh
available for search.

// tag::refresh-interval-default[]
By default, Elasticsearch periodically refreshes indices every second, but only on
indices that have received one search request or more in the last 30 seconds.
// end::refresh-interval-default[]
You can change this default interval
using the <<index-refresh-interval-setting,`index.refresh_interval`>> setting.

Refresh requests are synchronous and do not return a response until the
refresh operation completes.

[IMPORTANT]
====
Refreshes are resource-intensive.
To ensure good cluster performance,
we recommend waiting for {es}'s periodic refresh 
rather than performing an explicit refresh
when possible.

If your application workflow
indexes documents and then runs a search
to retrieve the indexed document,
we recommend using the <<docs-index_,index API>>'s
`refresh=wait_for` query parameter option.
This option ensures the indexing operation waits
for a periodic refresh
before running the search.
====

[[refresh-api-path-params]]
==== {api-path-parms-title}

include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=index]
+
To refresh all indices in the cluster,
omit this parameter
or use a value of `_all` or `*`.


[[refresh-api-query-params]]
==== {api-query-parms-title}

include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=allow-no-indices]
+
Defaults to `true`.

include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=expand-wildcards]
+
Defaults to `open`.

include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=index-ignore-unavailable]


[[refresh-api-example]]
==== {api-examples-title}


[[refresh-api-multiple-ex]]
===== Refresh several data streams and indices

[source,console]
----
POST /my-index-000001,my-index-000002/_refresh
----
// TEST[s/^/PUT my-index-000001\nPUT my-index-000002\n/]


[[refresh-api-all-ex]]
===== Refresh all data streams and indices in a cluster

[source,console]
----
POST /_refresh
----